MK-677 (Nutrobal/Ibutamoren)



Nutrobal (mk677), also called Ibutamoren, is considered a non-peptide agonist of the ghrelin receptor and a growth hormone secretagogue.   Many people have confused it as being a SARM (selective androgen receptor modulator), because it is typically sold as one and stacked with them.  However, much of the information out there on this compound is misguided, and users are leaving a lot of potential on the table by not reading the most updated information.


As of 2017, Nutrobal (mk 677) is still in preclinical stages of development for the medical purpose of aiding deficiencies in growth hormone.   The producers of it are Reverse Pharmacology, and it was originally developed for osteoporosis, muscle wasting prevention, and obesity.  People in the fitness community have started to use it due to its ability to increase lean muscle mass, boost IGF-1 (insulin growth factor-1), cut body fat, and raise appetite.

How it works via Ghrelin and IGF-1

The most notable way Nutrobal (mk 677) works is via stimulating endogenous ghrelin.  Ghrelin is our hunger hormone, produced by ghrelinergic cells in our stomach, and is the main neuropeptide in our central nervous system (CNS). It also plays a major role in regulating the rate and use of energy, which is called energy homeostasis.

Ibutamoren also works to mimic the hormones GH (growth hormone) because it mimics it in the body.  The nice thing about this is, unlike exogenous growth hormone you would inject, Ibutamoren does not suppress your bodies natural hormones at all.  It also will boost your IGF-1 (insulin growth hormone-1) without causing a rise in cortisol (a nasty stress hormone).

Finally, it inhibits somatostatin receptors by slowing down their activity, which prevents any chance of losing muscle.

benefits of mk-677 (Ibutamoren)

How can Nutrobal (mk-677) boost my athletic performance?

  • Expect a very fast boost in hunger, which helps you feed your body more nutrition.
  • You will build more muscle mass and strength.
  • Fat loss will occur even without changing your diet.
  • It can help with wrinkles, skin, nails, and even your hair.
  • You can repair soft tissue like ligaments and tendons.
  • Your bones will get stronger and you will heal nagging injuries faster.
  • Better recovery times between workouts.

Benefits And User Reviews

Since Nutrobal (mk 677) is pretty new to the fitness industry, let’s take a closer look at the benefits and the actual user reviews.

Gaining muscle and losing fat at the same time

Recomping, which is gaining quality muscle AND losing fat, is the hardest thing to do in bodybuilding and rarely achieved.  Users are impressed with Nutrobal (mk 677)’s ability to help them gain lean muscle mass, look more vascular, lean up, and have explosive workouts.

Matthh says: “My vascularity is insane, I’m up 10 pounds, and I can see my abs for the first time since high school. Everyone is asking me what I am taking and I smirk.  Just have been using Nutrobal (mk677) for 8 weeks.”

Psiszle says:  “As a female, I have never once in my life been able to cut down body fat while still keeping my strength in the gym.  It has always been cut down, lose a ton of strength, then have to start all over again. I’ve used Nutrobal (mk-677) for the past 12 weeks and I went from 22% body fat down to 18% while improving my bench press from 95 pounds to 120.”

Skin and nails

Poor skin health and nails can actually be an indicator of poor growth hormone levels.

strykne9er says: “My girlfriend has hassled me about my crappy skin and nails since our first date.  After 2 months on Nutrobal (mk-677) there has been a huge improvement and now she is jealous lol.”

Sleep improvement

Sleep is the most important part of repairing and recovering from a hard workout. If you fail to get enough of it, or poor quality, you will never have a chance to reach your fitness goals.  One of the first things a person will notice during the first 1 or 2 weeks of using Nutrobal (mk 677) is the sleep improves drastically.

Dedication888 said “I’ve had trouble sleeping ever since finishing my MBA in college 10 years ago, I am lucky to get even 4 hours of good sleep.  After 2 weeks on Nutrobal (mk 677), I fall asleep hard and don’t wake up for 7 hours to even pee.”

Hunger boost

We all know to feed our muscles we need to eat quality whole foods.  Nutrobal (mk-677) is great for those who simply lack an appetite. In fact, the hunger boost will kick in very quickly.

Nelson Georgina said: “I can’t believe after just 1 week on this stuff I am already hungry all the time, this stuff is amazing!”

How to stack and dosages

Nutrobal (mk-677) can be run solo at 25mgs-50mgs total per day.  The most common way is to split the dosage upon waking and then again in the evening. However, some choose to dose it all just in the morning.

Stacking with anabolic steroids:

Nutrobal (mk677) can be stacked with any steroid cycle at 12.5mg-25mgs per day.  If you are cutting I would give it a shot with 500mgs a week of Primobolan and a light Testosterone dosage.   If you want to bulk then use it with 500mgs of Testosterone + 400mgs of Deca Durabolin.   For those recomping, use it with 250mgs of Trenbolone per week + 40mgs a day of Anavar.

Stacking with SARMs (selective androgen receptor modulators):

Those who are looking to heal their body and have general well being should use it with Ostarine Ostabolic (MK-2866), both at 25mgs per day.   If you want to recomp or cut down, use it at 25mgs with 20mgs a day of Cardarine (GW501516) + S4 (Andarine) at 50mgs per day.    Finally, those looking to bulk and want to take full advantage of its hunger boost should stack 50mgs with RAD140 (Testolone) at 10mgs per day + LGD4033 (anabolicum / ligandrol) at 10mgs per day.

For more ideas on stacking click this link.

Side effects

The side effects of Nutrobal (mk677) are minimal.  It is not suppressive, non-estrogenic, and non-androgenic.  The only complaints are people say it gives them too much hunger increases and some initial water retention.  Both side effects will eventually pass.

buy MK 677 Nutrobal Ibutamoren

Where to buy Ibutamoren

Nutrobal (mk677) can be acquired from research sites or underground. But it is important to buy from a legitimate source because they are heavily faked or laced with prohormones. sells real Ibutamoren for a reasonable price.